HF 95275 Compressor Advice

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  • cabinetman
    Gone but not Forgotten RIP
    • Jun 2006
    • 15216
    • So. Florida
    • Delta

    #16
    Originally posted by jdon
    Sorry!

    To prolong the misery, thanks to jackellis and cab'man for rightfully pointing out careless errors in my calculation. I forgot that tire pressure is relative- i.e. compared to atmospheric pressure: a tire with 0 psi at sea level would have 15 psi on the moon.

    It occurs to me that the limiting factor is probably how quickly air can pass through the valve stem. Anyone have an estimate of the effective area of a Schrader valve, so we can drag this discussion to an even lower level?
    I may be wrong with this evaluation, but filling a tire has a physiology that might be more simplified by a reference. The air pressure (PSI) might be compared to a water hose, in how fast the water can flow through it.

    The CFM's might be compared to how much water will flow through the hose. Since the tire's air pressure is basically volumetric, it's been said that there is or could be an exerted pressure if the tire has some air pressure, and that would increase if the air pressure applied is greater than that.

    With that premise, there could be a point of equalization when there would be no increase at a point matching the limited capability of the output of the compressor. Just thought I would mention that.

    .

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